Igniter with a safety unit

ABSTRACT

Igniter with safety unit, the safety unit comprises a push-button that is arranged at the backside of the gun body and partially protrudes out of the gun body, it can be pushed forward and return relative to the gun body; a elastic limit bar that is arranged at the side of the part of the ignition trigger that is towards the backside of the gun body, in natural condition, its end keeps against a barrier block which is integrated with the inner wall of the gun body; a button that is arranged in the push-button and protrudes out of the push-button, it can be pressed into the gun body and return. A protruding part arranged on the button&#39;s inner side protrudes towards the abdomen of the gun body. In natural condition, the protruding part is towards the blank part, but when the push-button is in pushed up condition, the protruding part is near the end of the elastic limit bar and opposite to it. Thereby, if the button is pressed down, the protruding part of the button pushes the end of the elastic limit bar to make it distort and deflect from the barrier block on the inner wall of the gun body. The locking situation of the ignition trigger can be released. The apparatus can fire the flammable gas only by doing the two compound actions i.e. pressing down the button and pushing up the push-button simultaneously, thus further improving the safety of the ignitor.

FIELD OF INVENTION

[0001] This invention relates to ignitor, in particularly, to one with asafety unit that can prevent it from being fired easily by children bymisplay.

BACKGROUND OF THE INVENTION

[0002] The existing igniter generally comprises a gun body which can begripped and a barrel extending away from the upper part of the gun body.A gas-fired tank and a pneumatic valve unit and a piezolighter and anignition trigger are arranged in the gun body. Liquefied flammable gasis contained in the gasfired tank. One can press the ignition triggerduring operation, thereafter the pneumatic valve opens, at the sametime, the piezolighter produces electrical spark at the port of theigniter barrel by wire to fire the flammable gas transported to the portof the igniter barrel through a transfer pipe. If people pressed theignition trigger continuously without unloosing it, a burning flame willcontinue at the port of the gun barrel. So it is very convenient tooperate this ignitor. Since the barrel of the igniter extends outsideand is away to the hand that griping the gun body. Compared with someignition equipment such as matchstick and lighter etc., this igniter hasremarkable security and flexibility, so it is favored by people. It canbe used in many occasions such as firing a gas range in a kitchen and aneedfire at picnic and the birthday candle at a soiree etc. However,because it is very easy to be operated and it is like a toy by theappearance and the function and the operating method, children are infavor of playing with it and can fire it by misplay easily that willbring potential danger.

[0003] Consequently, igniter with a safety unit was designed to solvethe problem mentioned above. The original safety unit is a lockingswitch in essence. And it has two positions as “on” and “off”. When itis at “off” position, the ignition trigger is prevented from beingpressed down. But many users forget to reset the ignition trigger to“off” position after igniting, so the locking switch has no function. Soigniter with an improved safety unit was designed, and its safety switchhas the performance of automatic return, that means when the igniter isnot in use or after being used, the safety switch is at “off” positionautomatically, so the ignition trigger can't be pressed down from beingimpeded by the safety switch or associated parts. This kind of technicalscheme is disposed in CN2,363,197U and U.S. Pat. Nos. 6,126,437 and6,135,762. But all the schemes have a same characteristic, that is,increasing an ignition preparing action or pressing down the safetyswitch or sliding the safety switch, and then one can press down theignition trigger to fire the flammable gas. It is very easy for childrento learn this, so its security is not perfect.

SUMMARY OF THE INVENTION

[0004] The object of this invention is to provide igniter with a safetyunit which can solve the problem mentioned above and can't be firedeasily by children by misplay.

[0005] Another object of this invention is to provide igniter of whichignition trigger can be press down to fire the flammable gas only bydoing two compound actions on the safety unit first.

[0006] The technology of this invention is in that, the igniter withsafety unit comprises a gun body which can be gripped and a barrelextending outside. A gas-fired tank and a pneumatic valve unit and apiezolighter are arranged in the gun body. An ignition trigger isarranged at the abdomen of the gun body and protrudes out of the gunbody, it is characterized in that the gun body further includes a safetyunit, the safety unit includes:

[0007] a push-button that is arranged at the backside of the gun bodyand partially protrudes out of the gun body, it can be pushed forwardand return relative to the gun body;

[0008] an elastic limit bar that is arranged at the side of the part ofthe ignition trigger that is towards the backside of the gun body, innatural condition, its end keeps against a barrier block which isintegrated with the inner wall of the gun body;

[0009] a button that is arranged in the push-button and protrudes out ofthe pushbutton, it can be pressed into the gun body and return, aprotruding part arranged on the button's inner side protrudes towardsthe abdomen of the gun body, in natural condition, the protruding partis towards the blank part, but when the push-button is in pushed upcondition, the protruding part is near the end of the elastic limit barand opposite to it.

[0010] In natural condition, because the elastic limit bar is preventedby the barrier block on the inner wall of the gun body, the ignitiontrigger can't be pressed down. But when the push-button is pushed up andits button is pressed down, or when the button is pressed down and thepush-button is pushed up, the protruding part of the button pushes theend of the elastic limit bar to make it distort and deflect from thebarrier block on the inner wall of the gun body. Thereby people canrelief the locking situation of the ignition trigger and press it downto fire the flammable gas.

[0011] Because the apparatus of this invention can fire the flammablegas only by doing the two compound actions i.e. pressing down the buttonand pushing up the push-button. Adults can accomplish the two compoundactions with thumb in turn. It still can be used conveniently andflexibly. Children can't learn the arcanum of this apparatus even theyobserve slinkingly because of the concealedness of the operation action.So this invention can further improve the safety of the ignitor.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012]FIG. 1 is a perspective view in accordance with an embodiment ofthe present invention.

[0013]FIG. 2 is a partially cross-sectional enlarged view in accordancewith an embodiment of the present invention at natural occasion.

[0014]FIG. 3 is a partially cross-sectional enlarged view in accordancewith an embodiment of the present invention at the occasion of preparingto fire the flammable gas.

[0015]FIG. 4 is a partially cross-sectional enlarged view in accordancewith an embodiment of the present invention at firing occasion.

[0016]FIG. 5 is a partially perspective exploded view in accordance withan embodiment of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0017] The invention will be described more details with reference tothe accompanying drawing.

[0018] As shown in FIGS. 1 to 5, the igniter with a safety unitcomprises a gun body 2 which can be gripped and a barrel 1 extendingoutside, reference to FIG. 1. A gas-fired tank and an ignitionsubassembly 6 consisted of a pneumatic valve unit 61 and a piezolighter62 are arranged in the gun body 2. An ignition trigger 3 is arranged atthe abdomen of the gun body 2 and partially protrudes out of the gunbody 2. A socket body 31 is arranged on one side of the ignition trigger3 towards the backside of the gun body. An elastic limit bar 7 insertsinto a longitudinal hole 32 of the socket body 31 from up to down andengages with it. The elastic limit bar 7 has a hook 71 which can chuckthe upper end of the socket body 31. In natural condition, the low end73 of the elastic limit bar 7 keeps against a barrier block 22 which isintegrated with the inner wall of the gun body 2 by mould, reference toFIGS. 2 to 5.

[0019] A push-button 4 is arranged at the backside of the gun body 2 andpartially protrudes out of the gun body 2, a spring 8 is mounted in aindentation 41 of the push-button 4, the upper end of the spring 8 keepsagainst a barrier block 21 which is integrated with the inner wall ofthe gun body 2 by mould, reference to FIGS. 2 to 5.

[0020] A button 5 is arranged in the central cavity 42 of thepush-button 4. The inner side of the button 5 is supported by a releasespring in the cavity 42. The button 5 is limited by its hook 51 chuckingthe inner wall of the cavity 42 of the push-button 4 and its backprotrudes out of the push-button 4. In addition, a protruding part 52arranged on inner side of the button 5 protrudes towards the abdomen ofthe gun body 2. The protruding part 52 is higher than the barrier block22 and the low end 73 of the elastic limit bar, but it is almost in thesame level with the low end 72 of the elastic limit bar. In naturalcondition, the protruding part 52 is towards the blank part of the gunbody 2, as shown in FIG. 2, but when the push-button 4 is in pushed upcondition, the protruding part 52 is near the end 72 of the elasticlimit bar and opposite to it. Hereby, if the button 5 is pressed down,the protruding part 52 of the button pushes the end 72 of the elasticlimit bar to make it distort and deflect from the barrier block 22 onthe inner wall of the gun body. Thereby, people can release the lockingsituation of the ignition trigger 3, as shown in FIG. 3, so one canpress down the ignition trigger 3 to fire the flammable gas; afterigniting, the button 5 and the push-button 4 and the ignition trigger 3are released, the button 5 is released to outside by the spring 9, thepush-button 4 returns back by the spring 8, and the ignition trigger 3returns back following the piezolighter 62.

[0021] In this embodiment, the end 72 is beyond the end 73 to make theprotruding part 52 push the end 72 easily that can make the end 73deflect the barrier block 22 on the inner wall of the gun body quickly.In addition, in order to make “first pressing down the button 5 and thenpushing up the pushbutton 4” and “first pushing up the push-button 4 andthen pressing down the button 5” have the same effect, the end 72 of theelastic limit bar is designed as a arc protrusion.

[0022] In this embodiment, the appearance of the low part of the barrierblock 22 on the inner wall of the gun body is an inverted triangle thatcan make the elastic limit bar 7 return to the natural shape when theignition trigger 3 is pressed down completely to fire the flammable gas,reference to FIG. 4, so even the igniter is in a firing situation for along time, the elastic limit bar 7 will not be destroyed by theexcessive distortion.

[0023] The spring 8 and spring 9 mentioned above can be replaced byother conventional means so long as they can make the push-button 4 andthe button 5 return back.

[0024] The connection relation between the elastic limit bar 7 and theignition trigger 3 is not limited to the way provided in thisembodiment, it also can utilize various fixing connection ways. All ofthe modifications fall into the scope of the present invention.

1. Igniter with a safety unit comprises a gun body which can be grippedand a barrel extending outside, a gas-fired tank and a pneumatic valveunit and a piezolighter are arranged in the gun body, an ignitiontrigger is arranged at the abdomen of the gun body and protrudes out ofthe gun body, wherein the gun body includes a safety unit, the safetyunit includes: a push-button that is arranged at the backside of the gunbody and partially protrudes out of the gun body, it can be pushedforward and return relative to the gun body, a elastic limit bar that isarranged at the side of the part of the ignition trigger that is towardsthe backside of the gun body, in natural condition, its end keepsagainst a barrier block which is integrated with the inner wall of thegun body, a button that is arranged in said push-button and protrudesout of the push-button, it can be pressed into the gun body and return,a protruding part arranged on the inner side of the button protrudestowards the abdomen of the gun body, in natural condition, theprotruding part is towards the blank part, but when the push-button isin pushed up condition, the protruding part is near the end of saidelastic limit bar and opposite to it.
 2. Igniter with a safety unitaccording to claim 1, wherein there is a protrusion on one side of saidelastic limit bar opposed to a protruding part of said button. 3.Igniter with a safety unit according to claim 2, wherein the endprotrusion of the elastic limit bar is designed as a arc shape. 4.Igniter with a safety unit according to claim 1 or 2 or 3, wherein asocket body with a longitudinal hole is arranged on one side of theignition trigger towards the backside of the gun body, said elasticlimit bar inserts into the longitudinal hole from up to down and engageswith it, there is a hook on the upper end of the elastic limit bar, thehook can chuck the upper end of the socket body.
 5. Igniter with asafety unit according to claim 1 or 2 or 3, wherein there is anindentation in the upper part of the push-button, a spring is mounted inthe indentation, the upper end of the spring keeps against a barrierblock which is above the spring and integrated with the inner wall ofthe gun body.
 6. Igniter with a safety unit according to claim 1 or 2 or3, wherein said push-button has a central cavity, said button isarranged in this cavity, the button is limited by its hook by chuckingthe inner wall of the cavity of the push-button, the inner side of thebutton is supported by a release spring in the cavity of thepush-button.
 7. Igniter with a safety unit according to claim 1 or 2 or3, wherein the low part of the barrier block fixed on the inner wall ofthe gun body and being against by the end of said elastic limit bar isan inverted triangle shape.